Pyaif



G. D. SEROPYAN.

MEANS OF PREVENTING GOUNTERFEITING BANK NOTES, 6m. 1%. 17,473. I PATENTED JAN. 2, 1857.

a 61K (RPM)? af UNITED STATES PATENT OFFICEQ cnmsrornnn D. SEROPYAN, or new YORK, IN. Y., ASSIGNOB TO WM. I

COUSLAND AND J. D. BALD. v a

IMPROVEMENT TO PREVENT COUNTERFEITIN G BANK-NOTES, 84C.

Specification forming part of Letters Patent No. 17,473, dated Junei, 1857.

To all whom, it may concern.-

Be it known that I, CHRISTOPHER D. SERo- PYAN, of the city, county, and State of New York, have invented a new and useful means of preventing counterfeiting bank-notes, drafts, and all other papers representing value by the photographic process-that is, preventing bank-notes, drafts, and all other papers representing valucfrom being counterfeited by the aforesaid principal mode of counterfeiting, which contains all other processes of counterfeiting which depend on a perfect photographic negative; and I do hereby declare that the following is a full and exact description thereof.

The nature of my invention consists in using tinted or colored paper for bank-,notes,drafts and all other papers representing value,which absorb or do not reflect or transmit the chemical rays of light, and printing the other parts of themi. 0.,the obligatory and the ornamental parts-with an ink which is equally or more fugitive than the tint or the color of the paper, and which will absorb or not transmit or reflect the chemical rays of light. Banknotes, drafts, and all other papers representing value prepared by the combination of the aforesaid principles cannot be counterfeited by the aforesaid process, for as long as the tint or the color of the paper (or of the material on which bank-notes, drafts, and all other papers representing value may be printed) and thevignettes and the lettering remain together adistinct copy of the same cannot be obtained, for both the color of the paper and the ink will absorb or will not transmit-or reflect the chemical rays of light, and therefore the result will be an indistinct and blurred copy. In order to copy the said bank-notes, drafts, or any other paper representing value, the tint or the color of the paper of the bank-note must be first removed without disturbing the vignettes and lettering of the same, and the white surface of the paper of the bank-note exposed; but this cannot be done when banknotes, drafts, and all other papers representing value are printed with a fugitive ink, and which, as well as the tint or the color of the paper, will not reflect or transmit the chemical rays of light, for the color 'of the paper cannot be removed without destroying the vignettes and the lettering of the same.

To enable others skilled in the art to make use of my invention, Iwill proceed to'deseribe my mode of manufacturing according to my invention bank-notes, drafts, and all other pa= pers representing value.

I use red, orange, and yellow tinted or col varnish or boiled linseed-oil, and if the ink be not sufliciently black it is well to add a little blue ink to make it blacker; or any other organic or metallic substance which will not reflect or transmit the chemical rays of light, or will absorb the same as well as the color or the tint of the paper, and that is equally or more fugitive than the color of the paper itself, may be employed for such printing.

I am aware that bank-notes and drafts have been printed on tinted paper with a black ink, both of which absorb the chemical rays of light, and as long as these two colors remain together no photographic copy can be made;

but in such cases the ink has been less fugitive than the color of the paper, and in such case the color of the paper therefore can be removed without destroying the other parts, and then photographed. Iam also aware that an ink equally or more fugitive than the color of the paper has been used before. Such is described in my Letters Patent dated January 8, 1856; but in this case the ink transmits or reflects the chemical rays of light; but in no case to my knowledge has there been a banknote, draft, or any other paper representing value made combining the advantages of having both the' color of the paper and the color of the other parts such as to absorb and not to reflect or transmit the chemical rays of light, and at the same time the color of the paper less fugitive than the other parts; nor has there ever before been made, so far as I know or believe, a bank-note, draft, or any other paper representing value combining so much security; against counterfeiting with so much of light, or neither of which'will transmit or distinctness and beauty as those made accordreflect such rays, and have the color or the tint ing to this invention of mine. I of the paper less fugitive than the color of the What I claim as my invention, and desire to other parts. I by Letters Patent CHRISTOPHER n. SEROPYAN.

The application of at least two colors to the manufacture of bank-notes, drafts, and all other WVitnesses: papers representing value, both of which will equally, or nearly so, absorb the chemical rays GEO. GIFFORD, GEO. D. BALDWIN. 

